Robert D Newark , DE March 26, 2020 Appliance: Model SMH1987ST Se error code After trying a few cleaning tips on the circuit board, which worked a couple times but for very short periods, I bought a replacement module. This didn't include the circuit board which I thought it did, but didn't matter because it turned out to be all that was needed. Very easy to switch things over to the new module. Its been several days and its working fine. Samsung SMH9187ST Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes